Geophysical imaging by using attenuation property of multichannel seismic reflection data was tested to map spatial variation of physical properties of rocks in a volcanic area. The study area is located around Miyakejima volcanic island, where an intensive earthquake swarm was observed associated with 2000 Miyakejima eruption. Seismic reflection survey was conducted five months after the swarm...

Seismic imaging in challenging sedimentary basins and reservoirs requires acquiring, processing, very large volumes of data (tens terabytes). To reduce the cost acquisition time from acquiring to producing a subsurface image, novel systems based on compressive sensing (CS), low-rank matrix recovery (LRMR), randomized sampling have been developed implemented. These approaches allow practitioners...

This paper presents results from a seismic vulnerability analysis of the components of hydropower systems in Canada. A number of dams and their associated components (hydropower plants, switchyards, transmission towers, and supplementary equipment) at selected locations in western and eastern Canada were analyzed in the study. The seismic vulnerability for a given hydropower component was estim...

This report presents the final results from this contract to analyze the seismicity of the Yakima Fold and Thrust Belt (YFTB) region, Washington (Figure 1). The contract work involved the following: Apply conventional seismic tomography, using the public domain code simul2000 (Thurber and Eberhart-Phillips, 1999), to the YFTB region (121.25°W to 117.5°W and 45.5°N to 47.5°N) dataset of approxim...

Shallow water marine seismic surveys are necessary to understand a range of Earth processes in coastal environments, including those that represent major hazards to society such as earthquakes, tsunamis, and sea-level rise. Predicting the acoustic radiation of seismic sources in shallow water, which is required for compliance with regulations designed to limit impacts on protected marine specie...

Information about reservoir properties usually comes from two sources: seismic data and well logs. The former provide an indirect, low resolution image of rock velocity and density. The latter provide direct, high resolution (but laterally sparse) sampling of these and other rock parameters. An important problem in reservoir characterization is how best to combine these data sets, allowing the ...